Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ee1c7ea9458bd1b…

MALICIOUS

PDF

66.9 KB Created: 2020-08-21 20:32:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd164fb851d2f92d4f477542a2c2d33d SHA-1: fdbf5559415318fab9425bbfaf2066f5ac0000d5 SHA-256: 5ee1c7ea9458bd1b859015b16492942e4e191d578b35b7c7a166c06e7b1408a9
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document identified as malicious by ML classification and heuristics. It contains a lure for an advance-fee scam, referencing lottery winnings and parcel delivery requirements. The document also embeds a link to a redirector, https://ttraff.cc/pify?keyword=maven+interview+questions+and+answers+edureka, which is flagged as malicious. The presence of numerous external links, including a link farm, suggests an attempt to drive traffic or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=maven+interview+questions+and+answers+edureka
    • http://files.apexcommercialproperties.com/uploads/1/3/1/4/131406826/5a756d4ec82328.pdf
    • http://nebixut.2whatknots.com/uploads/1/3/1/4/131454215/9882858.pdf
    • http://jirak.pensionplanningsolutions.com/uploads/1/3/1/4/131409508/8e77eb348.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0364/9954/files/96405463642.pdf
    • https://cdn.shopify.com/s/files/1/0431/2363/8426/files/pupera.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/basketball_jersey_template_illustrator_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9983/2995/files/11234394045.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/nogifetevuwafanufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/lileg.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4981/files/70178070476.pdf
    • https://cdn.shopify.com/s/files/1/0439/9998/5822/files/carcinogenesis_vph.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/51610979150.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/wolf_whistle_sound_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/sorigudujoxupedurunito.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/35581192168.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6455/files/rebufejiwakosezak.pdf
    • https://cdn.shopify.com/s/files/1/0438/3480/2333/files/medicinal_plants_project_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/sabudigobejedejemivukufeg.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba00.bin
92b673e9d55573d4f6114706673e2d9d860a8c27ecd2dacfbe234a0f8ad3df9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA00 5136 bytes
font_01_sfnt_off0000cba0.bin
3f632a3e7ef8257592cdbd417b78ef68152ba6b4754fc84caf55ab66705f6a97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA0 15972 bytes

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